Author Topic: Some help with the CLUTCH  (Read 2898 times)

Offline Daniel Toro (DT)

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Some help with the CLUTCH
« on: 27.03. 2009 15:08 »
Hi all.

I need change my clutch (or put one) and I have a few doubts.

First, my clutch doesn't have the cover.
And looking the manual, i don't know how to fix if I buy one.
I need buy the sprockets too?

The picture is attached.

Well, looking at the ebay i found this itens:

http://cgi.ebay.co.uk/6-NEW-CLUTCH-SPRINGS-BSA-A-B-PLUNGER-MODELS-A7-A10_W0QQitemZ360111564483QQihZ023QQcategoryZ108839QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262?_trksid=p1742.m153.l1262

http://cgi.ebay.co.uk/5-NEW-SURFLEX-CLUTCH-PLATES-BSA-A7-A10-PLUNGER-6SPRING_W0QQitemZ140302917280QQihZ004QQcategoryZ108839QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262?_trksid=p1742.m153.l1262

http://cgi.ebay.co.uk/5-SURFLEX-STEEL-CLUTCH-PLATES-BSA-C10-C11G-C12-A7-A10_W0QQitemZ360028758583QQihZ023QQcategoryZ108839QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262?_trksid=p1742.m153.l1262


Is that correct?
I have ony 3 friction plates and steel plates.
Have 1 tick and 4 thin, right?

oh, i don't have the petrol taps too, i put one of some honda motorcycle.
Suggestions?


Many thanks.




-= DT - Loco =-
 -= SombreroS - SP =-
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1950 BSA Golden Flash A10 Plunger 650cc

Offline beezalex

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Re: Some help with the CLUTCH
« Reply #1 on: 27.03. 2009 17:46 »
Senor Loco,

Those springs look a little spindly to me....don't really know if they're right, kinda hard to tell.  I'd buy from Draganfly or Domiracer to be sure.

BTW, you should have five friction plates, five thin steel plates and one thick steel plate at the back.  I assume the set on ebay does not include the thick back plate.  Hope that helps.
Alex

Too many BSA's


Offline a10gf

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Re: Some help with the CLUTCH
« Reply #2 on: 27.03. 2009 21:01 »
DT, in addition to evaluating the ebay stuff, maybe download tha catalogues from f.ex http://www.draganfly.co.uk/ and http://www.srm-engineering.com/ and send them some email questions. Lots of good reading, and I'm sure you'll end up ordering much more than clutch parts! If you prefer to deal with USA, maybe someone here can recommend dealers.

Sorry for hijacking the thread, but I have to ask, what's the special dynamo and ignition arrangement ?

e


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Offline BSA_54A10

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Re: Some help with the CLUTCH
« Reply #3 on: 27.03. 2009 22:51 »
As stated earlier your clutch is too small for an A10 and could very well be from an M or C series which have fewer plates ( because they have a lot less power) .
While the plates are all the same, the baskets & centers are different lengths to accomodate the different number of plates.
The thick plate goes at the front in the belief that it should go there to spread the pressure from the pressure plate evenly.

If you need to replace the sprockets as well you would be better off replacing the entire 6 spring job with the latter and much better 3 or 4 spring clutches.
 
Bike Beesa
Trevor

Online trevinoz

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Re: Some help with the CLUTCH
« Reply #4 on: 27.03. 2009 23:09 »
Trevor, it is a plunger bike. A bit hard to put any other clutch in.
Trev.

Offline BSA_54A10

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Re: Some help with the CLUTCH
« Reply #5 on: 28.03. 2009 10:17 »
Should have looked at the photo a bit harder before posting,
Either the glasses or the brain obviously need attention.
Bike Beesa
Trevor

Offline Daniel Toro (DT)

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Re: Some help with the CLUTCH
« Reply #6 on: 28.03. 2009 15:18 »
Thanks, i'll search on the suggested links.

But the doubt whit the cover continues, if i buy one, how can i fix?
Doesn't need to have something to attach the bolts?

A10gf, I awnser your question on a new post.

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1950 BSA Golden Flash A10 Plunger 650cc

Offline a10gf

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Re: Some help with the CLUTCH
« Reply #7 on: 28.03. 2009 16:14 »
Here's the complete clutch, also try a search for clutch from the main forum page, you'll find lot's of posts.
& take a look here http://www.a7a10.net/forum/index.php?topic=348.0

e

http://www.a7a10.net/forum/index.php?action=dlattach;topic=919.0;attach=2192;image

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Offline a10gf

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Re: Some help with the CLUTCH
« Reply #8 on: 28.03. 2009 16:40 »
yup, here's one showing all plates, and another showing detailed parts. (from service sheet 208 & 211).
And let me add that a well adjusted 6 spring works perfect.

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Online RichardL

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Re: Some help with the CLUTCH
« Reply #9 on: 28.03. 2009 17:00 »
It makes me wonder what a three or four-spring clutch feels like, not having eperienced one, since my six-spring also appears to work jsut fine (I have no way of knowing if it's "perfect.").

Richard L.
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Offline a10gf

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Re: Some help with the CLUTCH
« Reply #10 on: 28.03. 2009 17:06 »
That's easy to spot, no slip or drag, + smooth clutch handle and smooth gear shift.

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Offline LJ.

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Re: Some help with the CLUTCH
« Reply #11 on: 28.03. 2009 20:01 »
... and this is the difference between the early six spring clutch, which is so smooth and a joy to use, and the later six spring clutch which can be a downright devil to set up and operate! A later four spring clutch is also a joy to use and is very similar in operation to the early six spring. Yes there is a three spring clutch out there and also the big single spring one found on War Department M20s.
Ride Safely Lads! LJ.
**********************
1940 BSA M20 500cc Girder/Rigid- (SOLD)
1947 BSA M21 600cc Girder/Rigid-Green
1949 BSA A7   500cc Girder/Plunger Star Twin-(SOLD)
1953 BSA B33  500cc Teles/Plunger-Maroon
1961 BSA A10  650cc Golden Flash-Blue
1961 BSA A10  650cc Golden Flash-Red

Offline a10gf

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Re: Some help with the CLUTCH
« Reply #12 on: 28.03. 2009 20:12 »
lj, thanks for the info, didn't know there were several 6 spring incarnations, must be the later one that is the source for the criticism that we read about now and then.

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Offline LJ.

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Re: Some help with the CLUTCH
« Reply #13 on: 28.03. 2009 22:23 »
The two types of six spring clutches was only brought to my realisation a short while ago, thanks to Brian who mentions it in another thread a couple of weeks ago. In the past I was struggling to understand why so many liked the six spring and yet so many hated it! Of course, now I realise there were two! early and late, both different in construction and I belive it is the inner part that is responsible. Looking closely at the early one it is a better and much more solid construction than the later cheaper one. Who knows, there may even have been other variations between these two.
Ride Safely Lads! LJ.
**********************
1940 BSA M20 500cc Girder/Rigid- (SOLD)
1947 BSA M21 600cc Girder/Rigid-Green
1949 BSA A7   500cc Girder/Plunger Star Twin-(SOLD)
1953 BSA B33  500cc Teles/Plunger-Maroon
1961 BSA A10  650cc Golden Flash-Blue
1961 BSA A10  650cc Golden Flash-Red

Offline beezalex

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Re: Some help with the CLUTCH
« Reply #14 on: 30.03. 2009 17:33 »
I wouldn't use "early" and "late" to distinguish the two six spring clutches since this is only true as it applies to A10's.  The wet six spring clutch with the crappy stamped center hub (the main reason why it's stink-o) was actually used BEFORE the dry clutch in the plunger A-series appeared in other bikes.  Perhaps "Dry 6-spring" and "wet 6-spring" would create less confusion.

Now, DT, if your clutch does not have the tin flange as shown in the drawing, you cannot attach the cover, though it is hard to imagine how someone could have fitted the wet-type six-spring clutch to a plunger gearbox mainshaft.  On top of that, there's no other BSA that used duplex chainwheel that would fit.  From that, I can only draw the conclusion that it is a plunger clutch and someone deliberately removed the flange.
Alex

Too many BSA's